WUR Negotiation and Acknowledgement Procedure Follow up July 2008 doc.: IEEE 802.11-08/1021r0 WUR Negotiation and Acknowledgement Procedure Follow up Date: 2017-03-12 Name Affiliation Address Phone Email Po-Kai Huang Intel 2200 Mission College Blvd., Santa Clara, CA 95054, USA   +1-408-765-8080   po-kai.huang@intel.com Minyoung Park minyoung.park@intel.com Robert Stacey robert.stacey@intel.com Shahrnaz Azizi shahrnaz.azizi@intel.com Po-Kai Huang et al. (Intel) Peter Loc

Abstract We have presented high-level MAC concepts for WUR in [5] In this presentation, we follow up on the following two MAC concepts WUR negotiation procedure Wake-up packet acknowledgement procedure Intel

WUR Negotiation Procedure As discussed in [5], to enable WUR negotiation procedure, we need to define WUR request/response and WUR Mode element carried in the WUR request/response to convey the essential information for the WUR negotiation Similar to other negotiation procedures (e.g. WNM, ADDBA), the WUR request/response is expected to be Action frames (i.e., management frames with subtype 1101) Primary Connectivity Radio Transmission AP WUR Response STA WUR Request Intel

WUR Action Frame The format of WUR Action frame is shown below The Category field is defined in 9.4.1.11 Action field, and one code will be defined for WUR The WUR Action field identifies different WUR Actions WUR Mode Request, WUR Mode Response, etc. The Dialog Token field is chosen by the non-AP STA sending the WUR Mode Request frame to identify the request/response transaction Category WUR Action Dialog Token WUR Mode Element Other Elements Octets 1 TBD Intel

WUR Mode Element The format of WUR Mode Element is shown below WUR information that can be defined Required time for turning on the 802.11 radio of the STA for AP to know the earliest time that STA can receive through primary connectivity radio if STA receives wake-up packet Duty-cycle of the wake-up receiver (WURx) of the STA to further reduce power consumption Other TBD fields Element ID Length WUR Information Octets 1 TBD Intel

WUR Acknowledgement Procedure As discussed in [5], the basic acknowledgement procedure for unicast wake-up packet is as follows After AP sends a wake-up packet to a STA, AP waits for a timeout interval If AP receives any packet from the STA within the timeout interval, the packet acknowledges the successful reception of the wake-up packet Otherwise, the wake-up packet transmission is considered to be failed, and the AP may retransmit the wake-up packet to the STA The timeout interval is larger than the required time for the STA to wake up the primary connectivity radio (i.e. 802.11) To increase reliability [5], AP may transmit more than one unicast wake-up packet successively, and the acknowledgement procedure is as follows If the same wake-up packet is transmitted within the existing timeout interval of the previous wake-up packet transmission, then a new timeout interval is established to replace the existing timeout interval Intel

WUR Acknowledgement Procedure Primary Connectivity Radio Transmission WUR Signal Transmission Example: Transmission Fails Timeout Interval Wake-up Packet To STA AP No packet transmission from the STA STA Transmission succeeds Timeout Interval Wake-up Packet to STA AP STA Any Packet Old Timeout Interval Wake-up Packet to STA Wake-up Packet to STA New Timeout Interval replaces old Timeout Interval AP STA Intel

Conclusion For the WUR negotiation procedure, we propose to Define WUR Action frame Define WUR Mode Element to carry WUR information For the WUR acknowledgement procedure of unicast wake-up packet, we propose to Define timeout interval to identify wake-up packet transmission success/failure Enable successive wake-up packet transmission to increase reliability Intel

Straw Poll 1 Do you support the following: Define WUR Action frame to enable WUR negotiation Yes: 27 No: 0 Abstain:17 Intel

Straw Poll 2 Do you support the following: STA can have Duty cycle mode for wake-up receiver (WURx) Yes: 24 No: 3 Abstain: 21 Po-Kai Huang et al. (Intel)

Straw Poll 3 Do you support the following: Define WUR Mode element that can carry following WUR information STA’s Duty cycle of wake-up receiver (WURx) Yes: 9 No: 3 Abstain: 31 Po-Kai Huang et al. (Intel)

Straw Poll 4 Do you support the following acknowledgment procedure for unicast wake-up packet After AP sends a wake-up packet to a STA, AP waits for a timeout interval If AP receives any transmission from the STA within the timeout interval, then the wake-up packet transmission is successful Otherwise, the wake-up packet transmission fails, and AP may retransmit the wake-up packet to the STA Yes: 22 No: 1 Abstain: 21 Intel

Straw Poll 5 Do you support the following for multiple unicast wake-up packet transmissions? If a wake-up packet is transmitted to the same intended STA within the existing timeout interval of the previous wake-up packet transmission, then a new timeout interval is established to replace the existing timeout interval Deferred Move to add to SFD Po-Kai Huang et al. (Intel)

Motion 1 Move to add the following to 11ba SFD: Define WUR Action frame to enable WUR negotiation Intel

Motion 2 Move to add the following to 11ba SFD: STA can have Duty cycle mode for wake-up receiver (WURx) Po-Kai Huang et al. (Intel)

Motion 3 Move to add the following to 11ba SFD: After AP sends a unicast wake-up packet to a STA, AP waits for a timeout interval If AP receives any transmission from the STA within the timeout interval, then the wake-up packet transmission is successful Otherwise, the wake-up packet transmission fails, and AP may retransmit the wake-up packet to the STA Intel

Reference [1] 11-16-1445-00 Overall MAC Procedure for WUR [2] 11-16-1460-01 WUR MAC Consideration [3] 11-16-1470-00 Wake-up and Data Exchange Sequences [4] 11-16-1504-00 Discussion of WUR Packets Design [5] 11-17-0071-00-00ba-high-level-mac-concept-for-wur Intel